Thomas Gleixner wrote:
On Wed, 2007-01-31 at 17:54 -0600, Robert Hancock wrote:
I'm not sure if there's an inherent max ramdisk size limit, however I
should point out that in most cases, using a tmpfs or ramfs file system
is better than old-style ramdisks. Those filesystems return unused
memory to the kernel (ramdisks statically allocate the entire space) and
also avoid the filesystem overhead of ramdisks (the files are mapped
into pagecache directly).
This is not a question of what's better or not.
Michal stepped into a real life problem:
1. ramdisk gets created in the first place w/o problems
2. formatting the same ramdisk succeeds
3. trying to use it fails
So either #1 or #2 should have failed in the first place. Failing in #3
is definitely a BUG in #1 or #2.
How does your advise help to fix that BUG ? Ignoring it by using
something else ?
Yes, there is likely a bug here of some sort. However, that doesn't
change the fact that ramdisks are sub-optimal for most uses.
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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